SMS Chat and Text
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| RD | Rescue Diver (PADI) | - | SMS Chat and Text |
| RDP | Recreational Dive Planner | - | SMS Chat and Text |
| RIB | Rigid-Hulled Inflatable Boat | - | SMS Chat and Text |
| RNT | Residual Nitrogen Time | - | SMS Chat and Text |
| ROV | Remotly Operated Vehicle | - | SMS Chat and Text |
| RSTC | Recreational Scuba Training Council. Organization That Sets Basic Guidelines For Scuba Diving Agencies. | - | SMS Chat and Text |
| RYA | Royal Yachting Association | - | SMS Chat and Text |